Die for planing metal articles.



1. LUNDGREN.

DIE FOR PLANING METAL ARTICLES.

APPLICATIQN FILED NOV 28, I913- 1,152,26, Patented 7, 1915.

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J. LUNDGREN.

DIE FOR PLANING METAL ARTICLES.

APPLICATION FILED NOV. 28. 1913.

Patented Sept. 7, 1915.

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" J1 I [VIICZKW COLUMBIA PLANOGRAPH CO.,WASHINOTON, B4 C4 @FFT J OHN LUNDGREN, OF DETROIT, MICHIGAN.

DIE FOR PLANING METAL ARTICLES.

Application filed November 28, 1913.

To all whom it may concern:

Be it known that I, JorrN Lunnennn, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Dies for Planing Metal Articles, of which the following is a specification, reference being had herein to the accompanying drawings.

My invention relates to a die for planing or shaving metal articles, and has among the objectsthereof to provide a construction which will efficiently and quicklyplane the articles; to provide a structure that will simultaneously plane a plurality of faces of the articles; to provide a die that may be employed for planing articles of difierent sizes or diiferent contour; to successively operate upon the article by a plurality of planing members; and further to provide a device in .whichthe shavings or portions of the metal planed from the articles are automatically removed from the planing members or tools after each operation.

Other objects of the invention will more fully hereinafter appear.

The invention resides in the peculiar construction, arrangement and combination of parts as will more fully hereinafter appear, and as particularly pointed out in the claims.

While my invention is adapted for various uses, I will however, illustrate and describe the same as embodied in a die for planing polygonal nuts.

In the drawings,-Figure 1 is atop plan view of a planing die embodying the invention; Fig. 2 is a similar view with the cap plate removed; Fig. 3"is a cross-section; Fig. t is a perspective view ,of one of the planing members, looking at the bottom face thereof; and Fig. 5 illustrates a step in the operation of planing.

In forming polygonal nuts the latter are cast into the shape and size desired, but when the castings are removed from the molds, it is necessary for the flat faces of the sides of the nut to be finished. This finishing operation is quite commonly accomplished by polishing or grinding. With my invention, however, the sides of the nut are planed or shaved, which will not only finish thefiat faces or sides,'but also will insure the nuts being of accurate size when finished. The structure illustrated in the Specification of Letters Patent.

Patented Sept. 7, 1915.

Serial No. 803,489.

drawings comprises a planing die A provided with a plurality of planing tools B arranged to form an opening C to conform With the contour of the finished article. Above the opening 0 is an opening D which forms a guide for the article, and positloned above the guide is a reciprocating punch E. Thus when the article is placed within the guide and the punch E moved downward,'the article will be forced through the planing tools B, which will operate upon the same to give the article the desired size.

Referring more specifically to the structure illustrated, the planing die A is pro vided with a bed F adapted to be secured to a suitable support (not shown). This bed has a circular chamber open at the top, within which is arranged a circular member G that carries the planing tools. The side walls H I of the members F G are machined so as to have a tight fit, and the bottom J of the member G rests upon the bottom K of the chamber in the bed. The member G is also provided with a circular chamber within which are arranged the planing tools B. As shown in Fig. 8, a plurality of these tools are employed and they are so shaped that the outer or rear edges L thereof tightly fit against the wall M of the member Gr, while the sides N of the adjacent tools B abut. The inner edges of the tools in the structure illustrated are shaped to provide a hexagonal opening O.

Each of the tools 13 is clamped to the member G by means-of a bolt 0, and the members 0 also serve to secure the member G to the bed.

P is a cap plate arranged over the outer faces of the tools B and secured to the member G bymeans of bolts Theopening D in the member P which forms the guide or centering means for the nut is of the same contouras that of the opening C but slightly larger so as to receive the nut in its unfinished condition.

Preferably the planingtools B are each composed of a plurality of planing members R, in the construction shown each tool being made up of four of these members. As shown in Fig. 5, the members R are comparatively fiat and the inner or forward edge S thereof forms the planing edge. The planing members are provided with alining openings T for engaging. the bolt 0 and the opening in the topmost member R is threaded to engage the threaded end U of the bolt 0. This arrangement, as before stated, not only clamps the planing tool to the member G, but also secures the latter to the bed. The planing edges S of the topmost members R are so arranged as to be slightly greater than the finished article. This is also true of the opening between the planing edges of the second members R, though the opening between the latter members is slightly less than that between the planing edges of the members R. Similarly the relative size of the openings between the members It and R iscorrespondingly varied, while the opening between the planing edges of the lowermost members R is of the size of the finished article. This will permit the planing edges of the members R, R, R and R to successively operate upon the nut or article fed through'the opening C by the punch.

V and W are openings in the member G and the bed to permit the articles to drop below the bed when the planing operation is completed. The bottom edge of the inner face of the planing members is beveled, as indicated at X so as to provide a chamber or space for receiving the shavings as the article passes through the planing die, as will be best seen upon reference to Fig. 5.

It is desirable to remove the shavings from the planing edges of the tools B and this is preferably accomplished by means of compressed air. As shown A is an annular channel extending around the bed and having openings-B, and C are a plurality of bores extending through the member G and communicating at one of their ends with the openings B. The forward or inner end of the bore C opens into a chamber D formed by cutting away the adjacent rear edges E of the tools B. The meeting lower side edges of the members R are beveled or cut away, as indicated at F, to form channels G communicating at their rear ends with the chamber D and at their forward or inner ends with the chambers X. Each of the members It is also provided on its bottom face with diagonally-extending channels H that communicate with the chamber 1) at one end and have their opposite end opening into the chambers X.

I is an annular chamber formed in the bottom of the member P and communicating with the chambers D.

J are a plurality of channels leading from the chamber 1 to a chamber K.

L is anopening leading through the side of the bed and which communicates with a suitable supply of compressed air.

In operation the nuts are placed in the guide D and forced through by the punch,

the compressed air continuously discharging through the various chambers and channels and automatically removing from the planing members all shavings or portions of metal planed olf. I

If desired, the joints between the various members may be sealed as with white lead.

It will be noted that as the article is forced through the die, the planing or shaving members will form a guide for the article during its successive engagement with the several planing members.

What I claim asmy invention is 1- 1. A die for planing metal articles, comprising a plurality of tools having their inner cutting edges arranged to form an opening of substantially the contour of the article to be planed, each tool comprising a plurality of superimposed members, there being channels formed at the meeting side edges of the tools and the latter being provided with channels attheir outer edges with which the first-mentioned channels communicate, a channel for compressed fluid communicating with the last-mentioned channel, the first-mentioned channels having their opposite ends positioned to direct compressed fluid over the cutting edges of said tool. I

2. A. die for planing metal articles, comprising a bed, a member arranged in said bed, a plurality of tools. arranged in said member] each composed of a plurality of superimposed members, the meeting side edges of said members being provided with channels having their opposite ends opening adjacent the cutting edges of said tool, said members being provided with channels at theirouter ends with which the first-mentioned channels communicate, and the member carried by said bed having bores communicating with the second-mentioned channels, and a channel for compressed fluid communicating with each of said bores.

3. A die for planing metal articles, comprising planing tools having their inner cutting edges arranged to form an opening of substantially the contour of the article to be planed, each tool being composed of a plurality of cutting edges arranged in diiferent planes, there being chambers intermediate the cutting edges, a bed upon which said tools are arranged, having an annular member surrounding said tools, therebeing channels for compressed fluid leading to said chambers, for the purpose described.

l. A die for planing metal articles, comprising a bed, a plurality of'planing tools mounted upon said bed and having their inner cutting edges arranged to form an opening of substantially the contour of the artic le to be planed, each tool being composed of a plurality of cutting edges arranged in different planes, there being shaving-receiving chambers between adjacent cutting edges, and there beingta plurality of channels for compressed fluid leading through said tools and communicating with said shaving-receiving chambers, said bed having a channel leading to a source of supply of compressed fluid and communicating with said channels in the tools.

5. In a die, a foot plate, a holder mounted therein and arranged to form an air passage between the foot plate and the holder, a series of cutting plates in the holder each having an inner shearing opening of desired contour, the plates being disposed in series with the opening therethrough decreasing in size toward the bottom of the series, a clamping ring for securing the dies in the holder, and an air nipple in the foot plate connected with the air passage formed between the foot plate and the holder, the cutting plates having channels connecting the air passage with the relief surfaces of the cutting plates.

6. A die comprising a foot plate having an opening therethrough, a holder secured in the foot plate with an opening in register with the plate opening, a series of cutting plates arranged in the holder and each provided with an interior opening of desired contour formed by the cutting edges of the plates, the openings decreasing in size toward the bottom of the series, and a clamping plate securing the cutting plates in the holder, the foot plate having an air inlet opening connected with a passage formed by a peripheral groove on the holder and with channels in the cutting plates leading to the relief surfaces of the cutting edges thereof.

In testimony whereof I afi ix my signature in presence of two witnesses.

JOHN LUNDGREN.

Witnesses WM. J. BELKNAP, JAMEs P. BARRY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

